Exchange has been a circus for years. I think that's why everyone went O365 in the first place. Managing to have a paid up configuration where you go down when a cloud provider goes down but you're hosting it locally is absolutely stupid and I am laughing my ass off here.

Also laughing at our ops guys who are now absolutely helpless and have people phoning them. I warned about this on our risk call and it was seen as low probability low risk. I hope it's down for a few hours :)